linux-kernel - Re: [PATCH 26/45] drm/msm/dp: replace power_on with active_stream_cnt for dp

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Message-ID: <7kok44t3q4dv7jsapvdq45t4lpoaxwkxe3f345ewpfyq3ndgoh@t532yskl2wys>
Date: Sun, 8 Dec 2024 13:50:42 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc: Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>, 
	Marijn Suijten <marijn.suijten@...ainline.org>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Stephen Boyd <swboyd@...omium.org>, 
	Chandan Uddaraju <chandanu@...eaurora.org>, Guenter Roeck <groeck@...omium.org>, 
	Kuogee Hsieh <quic_khsieh@...cinc.com>, Bjorn Andersson <andersson@...nel.org>, 
	Konrad Dybcio <konradybcio@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Vara Reddy <quic_varar@...cinc.com>, Rob Clark <robdclark@...omium.org>, 
	Tanmay Shah <tanmay@...eaurora.org>, linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org, devicetree@...r.kernel.org, 
	Jessica Zhang <quic_jesszhan@...cinc.com>, Laurent Pinchart <laurent.pinchart@...asonboard.com>
Subject: Re: [PATCH 26/45] drm/msm/dp: replace power_on with
 active_stream_cnt for dp_display

On Thu, Dec 05, 2024 at 08:31:57PM -0800, Abhinav Kumar wrote:
> For DP MST, the link clock and power domain resources stay on until
> both streams have been disabled OR we receive hotplug. Introduce an
> active_stream_cnt to track the number of active streams and necessary
> state handling. Replace the power_on variable with active_stream_cnt
> as power_on boolean works only for a single stream.

Okay, this answers one of my previous questions. Swapping these two
patches might be beneficial.

For this patch: 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>


> 
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>  drivers/gpu/drm/msm/dp/dp_audio.c   |  2 +-
>  drivers/gpu/drm/msm/dp/dp_display.c | 42 ++++++++++++++++++++++++-------------
>  drivers/gpu/drm/msm/dp/dp_display.h |  3 ++-
>  3 files changed, 31 insertions(+), 16 deletions(-)
> 

-- 
With best wishes
Dmitry